Passive intelligent detection roller suitable for long-distance belt conveyor
By embedding micro-power generation components and multiple sensors into the rollers of long-distance belt conveyors, passive intelligent detection has been achieved, solving the problems of insufficient detection accuracy and positioning difficulties, and improving the accuracy and efficiency of inspection.
Patent Information
- Application Number
- CN202511848086.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-01-13
AI Technical Summary
Existing intelligent detection systems for rollers in long-distance belt conveyors suffer from problems such as insufficient detection accuracy, high false alarm rate, inability to locate faults, and the need for external power supply.
A passive intelligent detection roller was designed, which has a built-in micro-power generation component and multiple sensors. It has the functions of detecting roller speed, temperature and vibration. It connects to the main base station through wireless communication to realize real-time monitoring and location of faulty rollers.
It achieves high-precision, multi-dimensional fault detection, reduces false alarm rate, reduces reliance on human resources, and can monitor roller lifecycle data in real time, thus improving the accuracy and efficiency of inspection.
Smart Images
Figure CN121323722A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of belt conveyor idler technology, specifically relating to a passive intelligent detection roller suitable for long-distance belt conveyors. Background Technology
[0002] Common belt conveyors mainly refer to belt conveyors (or rubber belt conveyors), often simply called belt conveyors. They are very important bulk material conveying equipment, widely used in large-scale projects such as mining, tunnel construction, and dock loading. A belt conveyor mainly consists of several basic parts, including a head drive roller, a tail steering roller, and a middle conveying mechanism. The detailed structure of the middle conveying mechanism includes a frame, a conveyor belt, upper idler rollers, and lower idler rollers. Idler rollers (also called rollers) are an important component supporting the cyclical operation of the conveyor belt. Their structure mainly consists of an outer roller skin, roller bearing housing, and a rotatable, coaxial roller shaft running through the center of the roller skin. They play a crucial role in the entire belt conveyor and are the most numerous and critical components, especially on long-distance belt conveyors. Since rollers rotate continuously with the conveyor belt, they are also the most prone to failure, requiring timely daily inspections and maintenance by operation and maintenance personnel. For example, visual inspection: inspectors use their eyes to check... Observe the surface of the roller body to check for cracks, wear, deformation or other visible damage; auditory inspection: use tools such as a listening stick to listen to the operating sound of the roller bearing, track the changes in sound, and determine whether the bearing is normal; however, since long-distance belt conveyors use a large number of rollers, relying solely on traditional manual inspection will inevitably have some drawbacks. Mainly, it cannot be implemented in projects that are 5-10KM long, as the distance is too long, often accompanied by rugged road conditions, inconvenient transportation, and inability to conduct rapid inspections. In addition, the accuracy and timeliness of manual inspection are difficult to guarantee.
[0003] To address the shortcomings of manual inspection, several intelligent inspection methods were developed, including: Infrared thermal imaging detection: Infrared thermal imaging sensors collect thermal imaging data of the idlers, and by analyzing the temperature distribution of the idlers, it can determine if there is abnormal heating, thus identifying whether the idlers are faulty; Audio detection: For example, using Hikvision's positional auscultation fiber optic system, sound information from the idlers is effectively collected through auscultation fiber optic probes, and intelligent algorithms are used to determine the working status of the idlers; Video image detection: By installing high frame rate cameras and other video recording equipment near the rollers, images of the rollers are collected in real time, and visual tracking algorithms are used to track monitoring points on the rollers to determine if the monitoring points have stopped rotating, thus identifying whether the rollers are abnormal; Drone inspection: Drones equipped with infrared and RGB cameras inspect long-distance rollers according to a preset flight route, collecting images and thermal imaging data of the rollers, which are then uploaded to the cloud for analysis and processing by AI; Fiber optic sensing detection: For example, Yokogawa Electric's DTSX system uses fiber optic sensing technology to inspect conveyor belts up to 50 kilometers long. Real-time temperature monitoring with a resolution of 0.03℃ can detect abnormal temperature changes in the rollers in a timely manner; however, the existing intelligent inspection technology is still in the development stage and still has various problems.
[0004] The above-mentioned solutions are all one-way detection methods, such as sound, vibration, and heat source detection. However, they all suffer from the problem that rollers operate in groups, leading to data interference. Operating environments also vary significantly; for example, some projects have high ambient temperatures, and infrared sensors lack training data, making false positives for high temperatures a likely misdiagnosis. Vibration sensors are easily affected by environmental vibrations, often affecting multiple sources, thus compromising accuracy. There are no other means to corroborate the actual occurrence of a fault. Sound sensors, essentially still based on vibration, also suffer from group interference. None of these single-solution solutions provide a second experimental method to verify the occurrence of a fault. For long-distance projects with tens of thousands of rollers, a persistently high false alarm rate will erode maintenance personnel's trust, leading to the abandonment of this inspection method. Furthermore, most of these solutions require power and cannot accurately pinpoint the location of the faulty roller or track roller usage data. Therefore, continued research and improvement of intelligent roller detection systems for long-distance belt conveyors are urgently needed. Summary of the Invention
[0005] In response to the above situation, the present invention provides a passive intelligent detection roller suitable for long-distance belt conveyors, which has the function of online detection of operating signals such as roller speed, temperature, and vibration. The roller itself has a built-in micro power generation component, which does not require an external power supply. Moreover, each roller has its own independent coded identity and positioning information module, and can wirelessly communicate with the main base station to report the number and location information of abnormal and faulty rollers in a timely and accurate manner.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A passive intelligent detection roller suitable for long-distance belt conveyors includes a roller shell forming an idler roller and roller bearing seats coaxially welded to the inner sides of both ends of the roller shell, and a roller shaft passing through the center of the two roller bearing seats. Each of the two roller bearing seats has a cavity recessed into the roller at its center. Within each cavity, from the inside out, a bearing, a power generation component, an integrated circuit board, and a roller seal are sequentially arranged. The bearing is installed between the roller bearing seat and the roller shaft to achieve a rotatable connection between the two. The power generation component includes a stator winding and a rotor magnetic ring. The stator winding consists of silicon steel sheets and several sets of induction coils wound around the silicon steel sheets. A fixing ring for the stator winding is located on the roller shaft. The rotor magnetic ring... The rotor magnetic ring consists of several sets of alternating N and S magnetic poles arranged in a coaxial movable ring around the outer circumference of the stator winding. The rotor magnetic ring is fixedly mounted on the inner wall of the cavity of the roller bearing housing by an interference fit. The rotor magnetic ring can rotate with the rotation of the roller skin, forming a rotating magnetic field around the stator winding on the stationary roller shaft, causing the induction coils of the stator winding to cut the magnetic field lines to generate electricity. The integrated circuit board is equipped with speed sensors, temperature sensors, and vibration sensors for detecting roller speed, temperature, and vibration, as well as a power processing module for converting the electrical energy generated by the power generation component into the working power of the integrated circuit board. The roller seal is coaxially sleeved on the outside of the roller shaft to seal the groove of the cavity of the roller bearing housing.
[0007] Furthermore, a main base station is also provided on the outside of the long-distance belt conveyor. The integrated circuit board also integrates an RF transceiver and antenna for wireless signal communication with the main base station, as well as a microcontroller for processing the detection signals of the speed sensor, temperature sensor, vibration sensor and the transmit and receive signals of the RF transceiver.
[0008] Furthermore, the integrated circuit board is equipped with a circuit board code, and the roller shaft is equipped with a roller code. The circuit board code and the roller code are integrated to form a combined code. The combined code, together with the corresponding frame beam code of the belt conveyor, is transmitted to the main base station. There is an identification information code at the factory. This code is integrated to form a combined code when the circuit board and roller are installed. There is also a code position information on the corresponding installed frame beam. This combined code and the middle and side roller position identification codes on the beam are combined by an external portable barcode scanner during installation to form a combined code and sent to the main base station. The combined code with the position information is also transmitted to the main base station operation and maintenance system.
[0009] Preferably, the silicon steel sheet of the stator winding is annular, and its outer wall is provided with a plurality of winding slots for winding induction coils. The number of induction coils is the same as the number of winding slots. For example, the silicon steel sheet of the stator winding preferably has 16 winding slots, corresponding to 16 induction coils. The two terminals at the beginning and end of the winding of the induction coil are connected to the input terminal of the power processing module of the integrated circuit board.
[0010] Preferably, the N and S poles of the rotor magnetic ring are both arc-shaped tile-shaped permanent magnets, such as ferrite materials. Several N and S poles form an integral circular rotor magnetic ring, and the total number of N and S poles that make up the rotor magnetic ring is the same as the number of induction coils.
[0011] Preferably, the power processing module includes a bridge rectifier circuit for converting the AC voltage generated by the power generation component into a pulsed DC voltage, a capacitor filter circuit for smoothing the pulsed DC voltage, a voltage clamping circuit for limiting the overvoltage after filtering and protecting the back-end circuit, and a voltage regulator and reset circuit for providing appropriate operating voltages for each electronic component on the integrated circuit board.
[0012] Preferably, the speed sensor is a pulse speed sensor, which detects the number of rotations of the idler roller by means of coil electrodes set on the integrated circuit board. Each rotation of the idler roller generates two positive pulse signals. By counting the number of positive pulse signals generated during the rotation of the idler roller, the corresponding frequency and speed information can be detected.
[0013] Preferably, the temperature sensor is an NTC negative temperature coefficient sensor. The temperature sensor is set on the integrated circuit board and its installation position is close to the inner wall of the roller bearing housing cavity. By sampling the temperature on the integrated circuit board, when the internal temperature of the roller reaches equilibrium, the internal temperature of the roller can be considered as the temperature of the roller because the temperature sensor is placed close to the inner bearing of the roller.
[0014] Preferably, the vibration sensor is a triaxial accelerometer, which is mounted on an integrated circuit board. The integrated circuit board is fixed on the roller shaft, and the vibration of the idler roller is transmitted to the roller shaft and then to the vibration sensor on the integrated circuit board, thereby realizing the vibration detection of the idler roller during operation.
[0015] Preferably, the integrated circuit board is a circular PCB board with a coaxial fixing ring set on the outside of the roller shaft. All electronic components are integrated and arranged on the PCB board. The PCB board also integrates and prints a curved and coiled antenna for transmitting and receiving radio frequency signals and conducting wireless communication with the main base station.
[0016] The present invention also includes other components that enable its normal use, all of which are conventional means in the art. In addition, devices or components not limited in the present invention, such as roller skins, roller bearing seats, bearings, roller shafts, and roller seals that make up the idler roller, all adopt the prior art in the art.
[0017] The beneficial effects of this invention are as follows: The passive intelligent detection roller provided by this invention has an appearance that is basically the same as a traditional roller, with a compact structure and simple manufacturing process. However, the roller itself has high self-inspection accuracy, can verify the fault type from multiple aspects, thereby pinpointing the source of the fault and making accurate diagnosis, which is not available from other single sensors. The power generation power consumption is 20mW, which is low power consumption and has little impact on the system, reducing the investment of human resources and maintenance time over long distances. It can also be made into an operation and maintenance system, which can monitor in real time with a mobile APP and collect data throughout the roller's life cycle, effectively solving the technical problems of long-distance belt conveyor inspection in the prior art. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the passive intelligent detection roller in this invention; Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 for Figure 1 Schematic diagram of the N and S magnetic pole planar structure of the rotor magnetic ring; Figure 4 for Figure 1 Schematic diagram of the silicon steel sheet structure of the middle stator winding; Figure 5 for Figure 1 PCB layout diagram of integrated circuit board; Figure 6 for Figure 1 Circuit diagram of the power processing module of the integrated circuit board; Figure 7 This is a block diagram showing the overall structure of the integrated circuit board in this invention; Figure 8 This is a schematic diagram illustrating the encoding and positioning principle of the passive intelligent detection roller in this invention. Figure 9 This is a circuit diagram showing the fault information transmission of the passive intelligent detection roller in this invention. Detailed Implementation
[0019] The present invention will now be clearly described in conjunction with the accompanying drawings and specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the scope of protection of the present invention.
[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "center," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for ease of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] Example like Figure 1-9 As shown, a passive intelligent detection roller suitable for long-distance belt conveyors includes a roller skin 1 that forms the idler roller, roller bearing seats 2 coaxially welded to the inner sides of both ends of the roller skin, and a roller shaft 3 passing through the center of the two roller bearing seats. Each of the two roller bearing seats has a recessed "U"-shaped cavity at its center. Within each cavity, from the inside out, are arranged a bearing 4, a power generation component, an integrated circuit board 5, and a roller seal 6. The bearing is installed between the roller bearing seat and the roller shaft to achieve a rotatable connection between them. The bearing, power generation component, integrated circuit board, and roller seal are all annular structures, coaxially mounted on the roller shaft from the inner bottom to the outer opening of the roller bearing seat cavity, and completely encapsulated within the cavity. The entire roller structure is compact and rationally laid out, and its size and shape are basically consistent with traditional idler rollers, facilitating the universal installation and replacement of a large number of idler rollers for long-distance belt conveyors.
[0022] The power generation component includes a stator winding and a rotor magnetic ring. The stator winding consists of silicon steel sheets 7 and induction coils 8 wound around the silicon steel sheets. The stator winding fixing ring is located on the roller shaft, which is fixedly connected to the frame of the belt conveyor. The silicon steel sheets of the stator winding are circular silicon steel rings formed by stacking thin silicon steel sheets with the fixing ring located on the outside of the roller shaft. Sixteen winding slots 10 for winding induction coils are equidistantly spaced on the outer wall of the ring. Sixteen induction coils are wound in the 16 winding slots. The windings of each induction coil are connected end to end by a single wire. Finally, two terminals are led out and connected to the input terminals of the power processing module of the integrated circuit board to provide working power for the entire integrated circuit board. This truly achieves self-sufficiency of the entire roller's power supply, eliminating the need for an external power source and better adapting to the installation and use of long-distance belt conveyors anytime and anywhere.
[0023] As shown in Figure 6, the two final leads of the induction coil of the power generation component are connected to the input terminal CON2 of the power processing module of the integrated circuit board. The circuit is rectified by bridge rectifier through D6, D2, D5, and D7, and then filtered by C2, which is a large capacitor of 0.47F, used to provide a stable voltage for the circuit.
[0024] The rotor magnetic ring consists of 16 alternately arranged N and S magnetic poles 9, coaxially and movable, located on the outer periphery of the stator winding. The rotor magnetic ring is interference-fitted onto the inner wall of the roller bearing housing cavity. The N and S magnetic poles of the rotor magnetic ring are arc-shaped, tile-like permanent magnets, and their alternating arrangement forms a complete circular magnetic ring. It is non-contact, movably, and coaxially fitted onto the outside of the stator winding. The inner end of the magnetic ring alternates between N and S poles, while the corresponding outer end alternates between S and N poles. The rotor magnetic ring rotates along with the roller skin, while the roller shaft and stator winding remain stationary. The vertical centerline of the rotor magnetic ring coincides with that of the stator winding, causing relative rotation between them. The rotor magnetic ring creates a rotating magnetic field around the stator winding on the stationary roller shaft, causing the induction coils of the stator winding to cut magnetic field lines, thus generating electricity according to Faraday's law of electromagnetic induction.
[0025] The integrated circuit board is equipped with a speed sensor, a temperature sensor, and a vibration sensor for detecting the roller speed, temperature, and vibration, respectively, as well as a power processing module for converting the electrical energy generated by the power generation component into the operating power of the integrated circuit board.
[0026] The power processing module includes a bridge rectifier circuit for converting the AC voltage generated by the power generation component into a pulsed DC voltage, a capacitor filter circuit for smoothing the pulsed DC voltage, a voltage clamping circuit for limiting the overvoltage after filtering and protecting the back-end circuit, and a voltage regulator and reset circuit for providing appropriate operating voltages for various electronic components on the integrated circuit board.
[0027] The speed sensor is a pulse speed sensor, which detects the number of rotations of the idler roller by means of coil electrodes set on the integrated circuit board. Each rotation of the idler roller generates two positive pulse signals. By counting the number of positive pulse signals generated during the rotation of the idler roller, the corresponding frequency and speed information can be detected. The frequency is proportional to the speed.
[0028] The temperature sensor is an NTC negative temperature coefficient sensor, mounted on an integrated circuit board close to the roller bearing. By sampling the temperature on the integrated circuit board, the internal temperature of the roller can be considered the temperature when it reaches equilibrium, due to the sensor's proximity to the roller bearing. During the operation of the belt conveyor, the rollers are constantly rotating. If the roller bearings are damaged or other components malfunction, it will lead to abnormal vibration, unusual noise, increased rotational damping, and increased temperature due to frictional heat.
[0029] The vibration sensor is a triaxial accelerometer with a range of ±2G. The vibration sensor is mounted on an integrated circuit board, and the integrated circuit board fixing ring is mounted on the roller shaft. The vibration of the idler roller is transmitted to the roller shaft and then to the vibration sensor on the integrated circuit board, thereby realizing the vibration detection of the idler roller during operation.
[0030] like Figure 5 As shown, the integrated circuit board is a circular PCB board with a coaxial fixing ring set on the outside of the roller shaft. All electronic components are integrated and arranged on the PCB board. The PCB board also integrates and prints a curved and coiled antenna 11 for transmitting and receiving radio frequency signals and conducting wireless communication with the main base station.
[0031] The roller seal is coaxially sleeved on the outside of the roller shaft. The roller seal is annular, with its inner circular surface fixedly sleeved on the outside of the roller shaft. The outer circular surface of the roller seal mates with the inner wall of the roller bearing housing cavity, sealing the groove of the roller bearing housing cavity. This provides excellent protection for the integrated circuit board, power generation components, and bearing components inside the cavity.
[0032] The long-distance belt conveyor is also equipped with a main base station on its outer side. The integrated circuit board is also equipped with an RF transceiver and antenna for wireless signal communication with the main base station, as well as a microcontroller for processing the detection signals of the speed sensor, temperature sensor, vibration sensor and the transmit and receive signals of the RF transceiver.
[0033] Pulse detection (detecting rotational speed), a negative temperature coefficient sensor (detecting temperature), and a gravitational acceleration sensor (detecting vibration) transmit the detection signals from these three sensors to a microcontroller as voltage or current signals. The microcontroller processes and analyzes the signals before transmitting them to the antenna via an RF transceiver to output the corresponding rotational speed, temperature, and gravitational acceleration detection signals. The external base station receives the signals, processes and analyzes them to determine if they are abnormal, and then transmits fault and normal signals to the maintenance system to display the number of faults. The roller circuit only transmits signals and does not process them.
[0034] like Figure 8 As shown, the integrated circuit board has an identification information code at the factory. This code is integrated into a combined code by a barcode scanner when the circuit board and the roller are installed. The corresponding frame beam also has coded position information. This combined code and the middle and side roller position identification codes on the beam are combined by an external portable barcode scanner during installation to form a combined code that is sent to the main base station. The combined code with the position information is transmitted to the main base station operation and maintenance system. The operation and maintenance system determines the position information of the faulty roller by re-identifying the beam position and the middle and side roller positions of the combined code.
[0035] like Figure 9 As shown, after a roller malfunctions, the signal transmission is analyzed by the maintenance system to output the fault location and quantity of the roller. By assigning address codes to the rollers and crossbeams, the roller signals and crossbeam signals of the entire project can be linked. After installing the corresponding base station for transmitting and receiving signals, the rollers of the entire belt conveyor system can be connected to the customer's maintenance system, enabling real-time monitoring of the roller status of the entire project. The roller fault detection process is roughly as follows: fault occurs - roller's built-in antenna transmits signal - relay station receives signal - relay station sends signal - customer monitoring system receives signal - feedback is sent to maintenance personnel to replace the roller, greatly reducing the walking distance and workload of traditional manual inspections of long-distance belt conveyors, which involves tens or hundreds of kilometers per day.
[0036] The present invention has the following main features: 1. Passive. It features a built-in micro-generator, making the roller itself completely passive, requiring no wiring and providing all its own power. It boasts low power consumption, with power generation power consumption below 20mW. Through its built-in coil magnet, it can generate its own electricity without the need for an external power source.
[0037] 2. Vibration Measurement. Built-in vibration sensors monitor bearing vibration in real time, capturing changes in peak vibration levels. Combined with chip calculations, fault characteristics are captured and transmitted.
[0038] 3. Temperature measurement. The built-in temperature sensor can measure the temperature in the range of -40 to +85℃ with a measurement accuracy of 0.5℃, which can detect bearing overheating faults in the first instance.
[0039] 4. Built-in coding. Each roller has a unique coding identity. By adapting to the base station and locking its position, the location information of the faulty roller can be accurately recorded.
[0040] 5. The rotational speed can be automatically detected through the built-in generator signal. Each circuit board is coded to transmit signals and carries positioning information, which can accurately determine the position and damage status of the rollers.
[0041] 6. Wireless Transmission. A built-in wireless transmitter can transmit fault information processed by the chip. The transmission frequency is adjustable from 10 minutes to 1 hour.
[0042] As can be seen from the above aspects, this invention uses multi-dimensional detection to verify whether a fault has actually occurred, thereby providing an accurate judgment.
[0043] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A passive intelligent detection roller suitable for long-distance belt conveyors, comprising a roller skin constituting an idler roller and roller bearing seats coaxially welded to the inner sides of both ends of the roller skin, and a roller shaft passing through the center of the two roller bearing seats, characterized in that: Each of the two roller bearing seats has a cavity recessed into the roller skin at its center. Within each cavity, from the inside out, are arranged a bearing, a power generation component, an integrated circuit board, and a roller seal. The bearing enables a rotatable connection between the roller bearing seat and the roller shaft. The power generation component includes a stator winding and a rotor magnetic ring. The stator winding consists of silicon steel sheets and several sets of induction coils wound around the silicon steel sheets. A fixed ring of the stator winding is mounted on the roller shaft. The rotor magnetic ring consists of several sets of alternating N and S magnetic poles arranged in a coaxial movable ring around the outer circumference of the stator winding. The rotor magnetic ring is mounted using an interference fit. The rotor magnetic ring is fixedly installed on the inner wall of the cavity of the roller bearing housing. It can rotate with the rotation of the roller skin, forming a rotating magnetic field around the stator winding on the stationary roller shaft, causing the induction coils of the stator winding to cut the magnetic field lines to generate electricity. The integrated circuit board is equipped with a speed sensor, a temperature sensor, and a vibration sensor for detecting the roller speed, temperature, and vibration, as well as a power processing module for converting the electrical energy generated by the power generation component into the working power of the integrated circuit board. The roller seal is coaxially sleeved on the outside of the roller shaft to seal the groove of the cavity of the roller bearing housing.
2. The passive intelligent detection roller suitable for long-distance belt conveyors according to claim 1, characterized in that: The long-distance belt conveyor is also equipped with a main base station on its outer side. The integrated circuit board is also equipped with an RF transceiver and antenna for wireless signal communication with the main base station, as well as a microcontroller for processing the detection signals of the speed sensor, temperature sensor, vibration sensor and the transmit and receive signals of the RF transceiver.
3. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 2, characterized in that: The integrated circuit board is equipped with a circuit board code, and the roller shaft is equipped with a roller code. The circuit board code and the roller code are integrated to form a combined code. The combined code, together with the corresponding frame beam code of the belt conveyor, is transmitted to the main base station, so that the main base station can accurately obtain the code and position information of each passive intelligent detection roller.
4. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 1, characterized in that: The silicon steel sheet of the stator winding is annular, and its outer wall is provided with a number of winding slots for winding induction coils. The number of induction coils is the same as the number of winding slots.
5. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 4, characterized in that: The N and S poles of the rotor magnetic ring are both arc-shaped tile-shaped permanent magnets. Several N and S poles form an integral circular rotor magnetic ring. The total number of N and S poles that make up the rotor magnetic ring is the same as the number of induction coils.
6. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 1, characterized in that: The power processing module includes a bridge rectifier circuit for converting the AC voltage generated by the power generation component into a pulsed DC voltage, a capacitor filter circuit for smoothing the pulsed DC voltage, a voltage clamping circuit for limiting the overvoltage after filtering and protecting the back-end circuit, and a voltage regulator and reset circuit for providing appropriate operating voltages for various electronic components on the integrated circuit board.
7. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 1, characterized in that: The speed sensor is a pulse speed sensor, which detects the number of rotations of the idler roller by means of coil electrodes set on the integrated circuit board. Each rotation of the idler roller generates two positive pulse signals. By counting the number of positive pulse signals generated during the rotation of the idler roller, the corresponding frequency and speed information can be detected.
8. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 1, characterized in that: The temperature sensor is an NTC negative temperature coefficient sensor, which is mounted on an integrated circuit board and its mounting position is close to the inner wall of the roller bearing housing cavity.
9. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 1, characterized in that: The vibration sensor is a triaxial accelerometer, which is mounted on an integrated circuit board. The integrated circuit board is fixed on the roller shaft.
10. A passive intelligent detection roller suitable for long-distance belt conveyors according to claim 2, characterized in that: The integrated circuit board is a circular PCB board with a coaxial fixing ring set on the outside of the roller shaft. All electronic components are integrated and arranged on the PCB board, and a curved and coiled antenna is also integrated and printed on the PCB board.